Daikin MicroTech III DPS Installation And Maintenance Manual page 91

Figure 27: L9 – Inverter Compressor Starting Failure
Caution: Be sure to turn off power switch before connecting or
Check if the
compressor lead wires are
disconnected
Check if the
insulation resistance of the
compressor is 100kΩ
or over
Check 3
Check if the
power transistor is
normal
Unusual
compressor
noise?
* Check 3
See page 75
www .DaikinApplied .com
disconnecting connectors to prevent parts damage .
YES
NO
YES
NO
NO
*
NO
YES
YES
YES
Fix the compressor lead wire
Correct the wiring; then restart
Replace the inverter compressor
Replace the compressor inverter PC board
Recheck the compressor/refrigeration circuit
Replace the inverter compressor
91 OM 1263 • MICROTECH UNIT CONTROLLER
Troubleshooting